Steam boiler heated by the waste gases



Dec. 14 1926. 1,611,040

G. JAHN ET AL STEAM BOILER HEATED BY THE WASTE CASES OF INTERNAL COMBUSTION ENGINES Filed Oct. 8. 1924 fill Patented Dec. 14, 1926.

UNITED STATES PATENT FFEFH GGTTLIEB JAHN, 0F KIEL, AND ARTHUR EUNKWITZ, 0F ELMSCi-IENEIAGEN, NEAR KIEL, ASSIGNORS TD FRIED. KRUPP GEBMANIAVERFT AKTIEITGESELLSCHAFT,

OF KIEL-GAARDEN, GERMANY.

STEAM. BOILER HEATED BY THE WASTE GASES OF INTERNAL-COMBUfiTION ENGINES.

Application filed October 8, 1924, Serial No. 742,457, and. in Germany October 26, 1923.

The invention relates to steam boilers which are heated by the waste gases of internal combustion engines and has for its object to improve the thermal output of such gases.

On the drawing is illustrated, by way of example, a preferred embodiment of the subject matter of the invention.

Fig. 1 showing a vertical section of the boiler,

Fig. 2 showing a section on line 22 01 Fig. 1, seen from above,

Fig. 3 being a partial plan view oi a partitionplate used in the foundation of the boiler.

Referring to the drawing, A denotes the boiler which is formed by. a vertical cylindrical fire tube boiler, Bis the foundation on which the boiler A is. supported and the cylindrical sheet-metal wall of which surrounds the heating chamber C and is lined with refractory bricks. The bottom plate o oi? the boiler A is inwardly cambered to such an extent, that a high room is formed the side wall of which is surrounded by the boiler water and which thus considerably ricreases the heating surface of chamber C. Fire tubes I lead from the chamber C to the chimney.

The waste gases are supplied from below and first enter an annular distributing chamber F into which fits the exhaust pipe of the internal combustion engine. the annular chamber F, in its turn, is connected to the heating chamber C by upwardly directed pas sages E which are outwardly and laterally inclined. To this end the re'tractory bottom layer oi the heating chamber C is supported on a cast iron plate G which is composed o't tour parts and has the shape illustrated in Fig. 3. This plate is provided with boxshaped inclined extensions each inculding one of said passages E T he latter lit into the heating chamber C near the outer wall thereof The gases entering the discharging chamber F come to a state of rest therein and then enter the heating chamber C through the passages E in a well'ordered flow.

The openings E extending obliquely. through the base of the heating chamber rection. the original motion being changed to a circulating, upwardly working motion di rertion toward the wall of the boiler. A {ireatvelocity is imparted to the streams oi waste gas in this way, which is particularly desired in oroer to increase the exchange of he s between the gases and the walls of the chamber C. The strong circulating motion provides further that in their upr-Jardly turning path the gases come in contact with all parts of the walls, and stationary separating layers or air between the walls and the hot gases, which would permit only a slug sh exchange of heat. do not arise. Upon risin in the chamber C, they will thus strike along the wall of the water chamot the boiler and deliver to it the main portion of their heat. Then the pass through all of the tire tubes D and escape into the chimney after having deliverel the remainder of their eii ective heat.

The described method of feeding the waste gases results in a high-grade utilization of their heat content.

A peep hole H permits of inspecting the heating chamber G from outside. J denotes an oil nozzle which may temporarily be started for additional heating in case the heat content of the waste gases should decrease and not suh'ice for heating the boiler.

Claim.

in a steam boiler to be heated by the waste gases of internal combustion engines and comprising a water chamber. a heating chambeu projecting from below into said water chamber so as to term a water leg around said heating chamber, a plurality of tire tubes leading from said heating chamber through said water chamber; a collecting chamber for the waste gases arranged below said heating chamber, and passages in the wall existing between said two chambers arranged both in an outwardly and laterally inclined direction.

The foregoing specification signed at lamburg, Gern'iany, this 18th day of September, 1924.

GOTTLIEB JAHN. ARTHUR RUNKlVIlZ. 

